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Quarter turn pneumatic actuators are
engineered with a specific design that enables them to execute rotational
motion within a 90 - degree arc. This design is centered around a piston or
vane mechanism. In a piston - based quarter turn pneumatic actuator, compressed
air enters a chamber, forcing the piston to move linearly. This linear motion
is then converted into rotational motion through a mechanical linkage, such as
a rack - and - pinion system. The piston's movement drives the pinion gear,
which rotates the output shaft connected to the valve or damper, achieving the
90 - degree turn.
In vane - type actuators, the vane is
attached to the output shaft and is housed within a cylindrical body. When
compressed air is introduced, it exerts pressure on one side of the vane,
causing the shaft to rotate. This design allows for a compact and efficient way
to generate the 90 - degree rotational motion.
This 90 - degree rotational range is highly
practical in various industrial applications. For example, in valve control
systems, it enables quick and precise opening and closing of quarter - turn
valves like ball valves and butterfly valves. In HVAC systems, the 90 - degree
rotation of dampers controlled by these actuators effectively regulates air
flow. The defined 90 - degree arc ensures consistent and reliable operation,
making quarter turn pneumatic actuators a preferred choice in many industries
where precise and rapid rotational actuation is required.
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